same issue .. i finally got the android 8 build working and flashed, but now the wifi does not work .. i know the hardware works becausei tried it on the image that came with the eMMC module ... but after i flashed a newly built android 8 system (unmodified), and updating the Nanopi M4V2 board, wifi no longer works .. no response on this since Sept .. wow .. anyone at FriendlyElec that can help? Can someone at FE build android8 and flash a NanoPi M4V2 and see if it works?

I had a look at your log file and I saw the same on my build. I am using the exact same source as you with only minor changes to remove the desktop icons and change the init.rc to make GPIO user space access.

The attached debug output shows what I see when I activate wifi on the T4 (this has the same hardware as the M4V2).

Can you capture and upload what the debug output shows when you go to Wifi settings and turn it on.

PS. Many of the errors in the debug output is normal. This AVC DENIED is SELINUX output but that is set to permissive which means it doesn't stop anything working but will show its output for the developer to take care of in the release version.

I will get the log tonight .. note that this is using the latest 8.1 branch from friendlyarm with no modifications on the nanopi-m4v2 board ... the hardware did work with the android on the eMMC module so something seems wrong with the android 8.1 branch ... i will get the log and post today

I would also note during the build, if i ran ./build-nanopc-t4.sh with -W option (i belueve it was) ,.. it said it would generate outptut .ko files in a certain directory but it did not generate anything there ... the build all option -F -M is suggested which is what i did and that did not generate it either